JP7365168B2 - AM device - Google Patents

Description

The present application relates to AM devices.

2. Description of the Related Art There is a known technology for directly modeling a three-dimensional object from three-dimensional data on a computer that represents the three-dimensional object. For example, Additive Manufacturing (AM) methods are known. As an example, there is direct energy deposition (DED) as a deposition type AM method. DED is a technology that performs modeling by locally supplying a metal material and melting and solidifying it together with a base material using an appropriate heat source. Further, as an example of the AM method, there is powder bed fusion (PBF). PBF creates each layer of a three-dimensional object by irradiating a two-dimensional spread of metal powder with a laser beam or electron beam, which is a heat source, to melt, solidify, or sinter the metal powder. to form. With PBF, a desired three-dimensional object can be modeled by repeating such steps.

US Patent No. 4,724,299 Special table 2019-500246 publication

Generally, when comparing PBF and DED, DED can increase the printing speed. However, in DED, when the modeling speed is increased, the amount of heat input is increased, which tends to cause a local temperature rise. As a result, excessive metal vapor is generated, the metal raw material is reduced, and the melted and solidified shape tends to be different from the intended shape, and the already shaped part may also be deformed due to the influence of heat. Further, in the case of DED, since variations in the shape of the modeled object are likely to occur, machining is often performed after modeling with DED. One purpose of the present application is to provide a technique for suppressing the generation of excessive metal vapor and the occurrence of deformation during modeling using the AM method. Another object of the present application is to provide a technique for minimizing or eliminating the need for machining after modeling.

According to one embodiment, an AM device for manufacturing a modeled object is provided, and the AM device includes a first DED nozzle for modeling the outline of the object to be modeled, and a first DED nozzle for modeling the inside of the outline. 2DED nozzle.

1 is a diagram schematically illustrating an AM apparatus for manufacturing a shaped object, according to an embodiment; FIG. 1 is a diagram schematically illustrating an AM apparatus for manufacturing a shaped object, according to an embodiment; FIG. 1 is a diagram schematically illustrating an AM apparatus for manufacturing a shaped object, according to an embodiment; FIG. 1 schematically illustrates an AM device with a cooling device, according to one embodiment; FIG. 1 schematically depicts a DED head, according to one embodiment; FIG. FIG. 3 schematically illustrates a cross-section of a DED nozzle, according to one embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an AM apparatus for manufacturing a shaped article according to the present invention will be described below with reference to the accompanying drawings. In the accompanying drawings, the same or similar elements are denoted by the same or similar reference numerals, and redundant description of the same or similar elements may be omitted in the description of each embodiment. Furthermore, features shown in each embodiment can be applied to other embodiments as long as they do not contradict each other.

FIG. 1 is a diagram schematically illustrating an AM apparatus for manufacturing a shaped object, according to one embodiment. As shown in FIG. 1, the AM device 100 includes a base plate 102. The object M will be formed on the base plate 102. The base plate 102 can be a plate made of any material that can support the shaped object M. Base plate 102 is placed on XY stage 104. The XY stage 104 is a stage 104 that is movable in two orthogonal directions (x direction and y direction) within a horizontal plane. Note that the XY stage 104 may be connected to a lift mechanism that is movable in the height direction (z direction).

In one embodiment, as shown in FIG. 1, the AM device 100 includes a first DED head 200. The first DED head 200 is connected to a laser source 202, a material powder source 204, and a gas source 206. The first DED head 200 has a DED nozzle 210. First DED nozzle 210 is configured to inject laser, material powder, and gas from laser source 202 , material powder source 204 , and gas source 206 . The first DED head 200 can be of any type, for example, a known DED head can be used. The first DED head 200 is connected to a moving mechanism 220 and is configured to be movable. The movement mechanism 220 can be arbitrary, for example, it can move the first DED head 200 along a particular axis, such as a rail, or it can move the first DED head 200 in any position and orientation. It may also consist of a robot that can move. The first DED head 200 is used to form the outline of the object, as will be described later.

In one embodiment, as shown in FIG. 1, the AM device 100 includes a second DED head 300. The second DED head 300 is connected to a laser source 302, a material powder source 304, and a gas source 306. Note that the laser source 302, material powder source 304, and gas source 306 connected to the second DED head 300 are the same as the laser source 202, material powder source 204, and gas source 206 connected to the first DED head 200. You may use one or a different one. The second DED head 300 has a DED nozzle 310. DED nozzle 310 is configured to inject laser, material powder, and gas from laser source 302, material powder source 304, and gas source 306. The second DED head 300 can be of any type, for example, a known DED head can be used. The second DED head 300 is connected to a moving mechanism 320 and is configured to be movable. The movement mechanism 320 can be arbitrary, for example, it can move the second DED head 300 along a particular axis, such as a rail, or it can move the second DED head 300 in any position and orientation. It may also consist of a robot that can move. The second DED head 300 is used to model the inside of the contour of the object formed by the first DED head 200, as will be described later.

FIG. 6 is a diagram schematically illustrating a cross-section of a DED nozzle 210 according to one embodiment. The DED nozzle 210 according to the illustrated embodiment includes a first passage 252 in the center through which a laser 250 passes. Further, the DED nozzle 210 includes a second passage 254 outside the first passage 252 through which the material powder and the carrier gas for transporting the material powder pass. Further, the DED nozzle 210 includes a third passage 256 outside the second passage 254 through which the shielding gas passes. The second passage 254 is configured such that the material powder discharged from the DED nozzle 210 is focused at substantially the same position as the focus position of the laser 250. In addition, in FIG. 6, the flow of material powder and carrier gas is shown by broken lines. The carrier gas can be an inert gas such as argon gas or nitrogen gas. Note that by using an inert gas as the carrier gas, oxidation can be prevented by covering the molten pool formed by melting the material powder with the inert gas. However, air outside the carrier gas may be drawn in by the flow of the carrier gas. Therefore, the DED nozzle 210 shown in FIG. 6 supplies the shielding gas at a low speed from the third passage 256 disposed outside the second passage 254 through which the powder material and carrier gas are discharged, thereby removing the surrounding air. can be prevented from getting caught. By preventing surrounding air (particularly oxygen) from being drawn in by the carrier gas, it is possible to suppress the formation of a metal oxide film and to form a molten pool with good wettability. In FIG. 6, the flow of shielding gas is indicated by arrows. Note that although FIG. 6 shows an embodiment of the DED nozzle 210 as an example, a similar configuration may be adopted for the DED nozzle 310.

In one embodiment, as shown in FIG. 1, AM device 100 includes a thermometer 150. In one embodiment, thermometer 150 may be capable of measuring the surface temperature of the object being formed, and may be, for example, a radiation thermometer.

In the embodiment shown in FIG. 1, AM device 100 includes a controller 170. The control device 170 is configured to control the operations of various operating mechanisms of the AM device 100, such as the above-described first DED head 200, second DED head 300, and various operating mechanisms. Control device 170 can be constructed from a general computer or a special purpose computer.

When modeling a three-dimensional object using the AM apparatus 100 according to the embodiment shown in FIG. 1, the following steps are generally performed. First, three-dimensional data of the object to be modeled is input to the control device 170. The control device 170 creates slice data for modeling from the input three-dimensional data of the object. Further, the control device 170 creates execution data including modeling conditions and recipes. The modeling conditions and recipe include, for example, beam conditions and lamination conditions. The beam conditions include voltage conditions and laser output of the laser sources 202 and 302, and the scan conditions include a scan pattern, a scan route, a scan speed, a scan interval, and the like. Examples of the scanning pattern include scanning in one direction, scanning in a reciprocating direction, scanning in a zigzag manner, and moving in a horizontal direction while drawing a small circle. The scanning route determines, for example, in what order the scanning is performed. The lamination conditions include, for example, the type of material, the average particle diameter of the powder material, the particle shape, the particle size distribution, the particle supply rate (supplied weight per unit time), the carrier gas flow rate, and the like. Note that some of the above-mentioned printing conditions and recipes may be created or changed depending on the input 3D data of the model, and may be determined in advance regardless of the input 3D data of the model. Good too.

The first DED head 200 is used to model the contour portion M1 of the first layer of the three-dimensional object. When shaping the outline portion M1, modeling is performed under conditions that allow accurate modeling of the outline and under conditions that prevent the shaped portion from deforming. It is desirable that the thickness of the contour portion M1 is such that when the inner side M2 of the contour portion is modeled in the next step, the formed contour portion M1 will not be deformed.

Once the contour portion M1 of the first layer has been modeled, the inner side M2 of the contour portion M1 that has been modeled is then modeled using the second DED head 300. When modeling the inner side M2, since the outline part M1 has already been formed, there is a small risk of deformation during modeling, so it is possible to perform the modeling under conditions that allow it to be printed at a higher speed than when modeling the outline part.

Once the first layer has been modeled, the outline portion M1 and inner portion M2 of the second layer are then modeled, and the third and fourth layers are repeated to complete the three-dimensional object. Note that during the modeling, particularly during the modeling of the contour portion M1, it is desirable to monitor the temperature of the portion that has been modeled using the thermometer 150. If the surface temperature of the modeled object M is high, excessive metal vapor is likely to be generated, and the shape of the modeled part may also be deformed due to the influence of heat. Therefore, it is desirable to monitor the temperature of the modeled part and start modeling the next layer only after the temperature of the layer below is sufficiently solidified. Further, in each layer, the modeling of the inner portion M2 may be started before the entire modeling of the contour portion M1 is completed. When a part of the contour portion M1 has been modeled, modeling of the inner portion M2 is started, and by proceeding with the modeling of the contour portion M1 and the inner portion M2 at the same time, the overall modeling time can be shortened.

In the AM apparatus 100 according to this embodiment, the contour portion M1 of the object M1 is modeled under conditions that allow for accurate modeling, and then the inner side M2 of the contour portion M1 is formed under conditions that are faster. The overall modeling time can be shortened while accurately modeling.

FIG. 2 is a diagram schematically illustrating an AM apparatus for manufacturing a shaped object, according to one embodiment. The AM apparatus 100 shown in FIG. 2 includes a base plate 102 and an XY stage 104, and a molded object M is formed on the base plate 102, similarly to the embodiment shown in FIG.

In one embodiment, as shown in FIG. 2, the AM device 100 includes a first DED head 200. The first DED head 200 shown in FIG. 2 can have a similar configuration to the first DED head 200 shown in FIG. 1.

In the embodiment shown in FIG. 2, the AM device 100 includes a material supply mechanism 400 for supplying material for a model. The material supply mechanism 400 includes a storage container 402 for holding powder, such as metal powder, that is a material for a model, and a movement mechanism 404 for moving the storage container 402. The storage container 402 is provided with an opening 406 for discharging the material powder onto the base plate 102. The opening 406 can be a linear opening 406 that is longer than one side of the base plate 102, for example. In this case, by configuring the moving mechanism 404 to move in a direction perpendicular to the straight line of the opening 406 in a range longer than the other side of the base plate 102, the material powder can be supplied to the entire surface of the base plate 102. The storage container 402 also includes a valve 408 for controlling opening and closing of the opening 406. The material supply mechanism 400 may include a blade (not shown) for leveling the material powder supplied from the storage container 402.

In one embodiment, as shown in FIG. 2, the AM device 100 includes a first beam irradiation head 500. The first beam irradiation head 500 is connected to a laser source 502 or has a built-in laser 502. Further, the first beam irradiation head 500 can be equipped with any optical system and is configured to be able to focus the laser onto the modeling surface. The first beam irradiation head 500 is connected to a moving mechanism 520 and is configured to be movable. The moving mechanism 520 may be any mechanism, for example, a mechanism capable of moving the first beam irradiation head 500 along a specific axis such as a rail. Alternatively, instead of or in addition to the moving mechanism 520, the AM device 100 is configured to be able to scan the laser from the first beam irradiation head 500 on the modeling surface using an arbitrary optical system such as a galvano mirror. It's okay. Note that it is desirable that the laser irradiated from the first beam irradiation head 500 be focused into a rectangular shape using an arbitrary beam shaper or the like and have a flat beam profile. Equipped with such laser characteristics, powder materials can be efficiently melted and sintered.

When modeling a three-dimensional object using the AM apparatus 100 according to the embodiment shown in FIG. 2, the following steps are generally performed. First, three-dimensional data of the object to be modeled is input to the control device 170. The control device 170 creates slice data for modeling from the input three-dimensional data of the object. Further, the control device 170 creates execution data including modeling conditions and recipes. The modeling conditions and recipe include, for example, beam conditions and lamination conditions. The beam conditions include voltage conditions and laser output of the laser sources 202 and 302, and the scan conditions include a scan pattern, a scan route, a scan speed, a scan interval, and the like. Examples of the scanning pattern include scanning in one direction, scanning in a reciprocating direction, scanning in a zigzag manner, and moving in a horizontal direction while drawing a small circle. The scanning route determines, for example, in what order the scanning is performed. The lamination conditions include, for example, the type of material, the average particle diameter of the powder material, the particle shape, the particle size distribution, the particle supply rate (supplied weight per unit time), the carrier gas flow rate, and the like. Note that some of the above-mentioned printing conditions and recipes may be created or changed depending on the input 3D data of the model, and may be determined in advance regardless of the input 3D data of the model. Good too.

The first DED head 200 is used to model the contour portion M1 of the first layer of the three-dimensional object. When shaping the outline portion M1, modeling is performed under conditions that allow accurate modeling of the outline and under conditions that prevent the shaped portion from deforming. It is desirable that the thickness of the contour portion M1 is such that when the inner side M2 of the contour portion M1 is modeled in the next step, the contour portion M1 that has already been modeled will not be deformed.

Once the contour portion M1 of the first layer has been modeled, the material supply mechanism 400 supplies powder material to the inner side M2 of the contour portion M1 that has been modeled. Next, a laser is irradiated from the first beam irradiation head 500 to the powder material on the inside M2 of the shaped contour portion M1, and the powder material at a predetermined position is melted and sintered. Model M2. Note that the inner portion M2 of the contour portion M1 of the first layer may be formed from a plurality of layers. In this case, each time each layer of the inner portion M2 is formed, the base plate 102 is lowered by one layer, a new powder material is supplied from the material supply mechanism 400, and the powder material is repeatedly irradiated with the laser. , may form the inner portion M2 of the contour portion M1 of the first layer. Alternatively, instead of lowering the base plate 102, the first beam irradiation head 500 may be moved upward by one layer each time each layer of the inner portion M2 is formed.

Once the first layer of the contour portion M1 and its inner portion M2 have been modeled, the contour portion M1 and inner portion M2 of the second layer are then modeled, and the third and fourth layers are repeated to form a three-dimensional object. Complete the modeling. Note that during the modeling, particularly during the modeling of the contour portion M1, it is desirable to monitor the temperature of the portion that has been modeled using the thermometer 150. If the temperature of the surface of the modeled object M is high, metal vapor is likely to be generated, and the supplied metal raw material may decrease or the shape of the modeled object M may be deformed due to the influence of heat on the already modeled part. Therefore, it is desirable to monitor the temperature of the modeled part and start modeling the next layer only after the temperature of the layer below is sufficiently solidified. Further, in each layer, the modeling of the inner portion M2 may be started before the entire modeling of the contour portion M1 is completed. When a part of the contour portion M1 has been modeled, modeling of the inner portion M2 is started, and by proceeding with the modeling of the contour portion M1 and the inner portion M2 at the same time, the overall modeling time can be shortened.

In the embodiment shown in FIG. 2, the outline portion M1 of the object is formed using the DED method, and the inner portion M2 is formed using the PBF method. In addition, in one embodiment, the AM apparatus 100 further includes a material supply mechanism 400 and a first beam irradiation head 500 shown in FIG. 2 in addition to the first DED head 200 and the second DED head 300 shown in FIG. It may be configured as follows.

FIG. 3 is a diagram schematically illustrating an AM apparatus for manufacturing a shaped object, according to one embodiment. In one embodiment, the AM device 100 includes a second beam irradiation head 600 as shown in FIG. The second beam irradiation head 600 is connected to a laser source 602 or has a built-in laser 602. The second beam irradiation head 600 is configured to irradiate the surface of the formed object M with a laser beam. The second beam irradiation head 600 is connected to a moving mechanism 620 and is configured to be movable. The moving mechanism 620 may be any mechanism, for example, it may be capable of moving the second beam irradiation head 600 along a particular axis such as a rail, or it may move the second beam irradiation head 600 in any position and orientation. It may also be composed of a robot that can move the beam irradiation head 600. By irradiating the surface of the formed object M with a laser, it is possible to re-melt and solidify the surface of the formed object M, and it is possible to eliminate the level difference when each layer is laminated and modeled, and to improve the surface roughness. can be made smaller. By reducing the level difference and roughness of the surface of the object M, it is possible to reduce the amount of machining required after the object is formed.

In FIG. 3, the AM device 100 includes the first DED head 200 and the second DED head 300 shown in FIG. 1 together with the second beam irradiation head 600. and a first beam irradiation head 500, or may include a first DED head 200, a second DED head 300, and a first beam irradiation head 500. Further, the second beam irradiation head 600 may irradiate the surface of the object M with the beam at the same time as other parts are being formed.

In one embodiment, the AM device 100 includes a cooling device 700 for cooling the modeled part. FIG. 4 illustrates an AM device 100 with a cooling device 700, according to one embodiment. The cooling device 700 includes a cooling member 702 disposed so as to be in contact with the periphery of the modeled part, and a cooling pipe line 704 passing through the inside of the cooling member 702. The cooling pipe line 704 has a coolant fluid flowing therethrough. It is configured as follows. Cooling line 704 is connected to a heat exchanger 706 for controlling the temperature of the refrigerant fluid.

In AM modeling, whether DED or PBF, metal powder is heated to high temperature, melted, and solidified to create a three-dimensional object of an arbitrary shape. In such an AM method, the structure of the model changes depending on the rate of temperature decrease, which affects the strength and corrosion resistance of the model. Therefore, in the AM method, it is desirable to control the rate of temperature decrease. In the AM method, a laser is irradiated to melt the material, so the overall environment tends to be high temperature. In the embodiment shown in FIG. 4, since the cooling device 700 is provided, it becomes possible to control the rate of decrease in the temperature of the shaped object M. For example, by controlling the cooling device 700 while monitoring the temperature of the shaped object M with the thermometer 150, the temperature of the shaped object and the rate of temperature decrease can be controlled. Although FIG. 4 shows the AM device 100 as including the first DED head 200 and the second DED head 200, the AM device 100 may use the first beam irradiation head 500 as shown in FIG.

Moreover, FIG. 4 shows how a modeled object including a bridge structure M3 is modeled. When modeling the bridge structure M3, a bridge plate 180 having a corresponding shape may be inserted. For example, with the bridge plate 180 placed at a predetermined position, the contour portion M1 including the bridge structure M3 is modeled using the first DED head 200 as described above, and then the inner portion M2 is modeled using the second DED head 200 or Modeling can be performed using the first beam irradiation head 500. Note that in one embodiment, the bridge plate 180 may have the function of the cooling device 700. For example, by providing the cooling pipe line 704 on the bridge plate 180, the bridge plate 180 can have the function of the cooling device 700. Further, instead of the bridge plate 180 disposed at a predetermined position, a guide plate connected to a moving mechanism such as a rail or a robot arm may be used. When modeling the bridge structure M3, it is possible to support melting and solidification by applying a guide plate to the bottom or side of the melted region. Furthermore, the bridge plate 180 and the guide plate also have the function of reducing the surface roughness of the coagulation surface.

FIG. 5 is a diagram schematically illustrating a DED head according to one embodiment. The DED head 800 shown in FIG. 5 is connected to a laser source 802, a material powder source 804, and a gas source 806, similar to the DED heads 200, 300 shown in FIG. DED head 800 has DED nozzle 810. DED nozzle 810 is configured to inject laser, material powder, and gas from laser source 202, material powder source 204, and gas source 206. In the DED head according to the embodiment shown in FIG. 5, a laser beam from a laser source 802 is split by a half mirror 808 or the like disposed within the DED head 800, and one side is irradiated from a DED nozzle 810 and the other side is irradiated from a DED nozzle. It is configured to be irradiated from the front of 810. Note that the front of the DED nozzle 810 is the front in the direction of movement (indicated by the arrow in FIG. 5) in which the DED head 800 moves during modeling. The laser irradiated forward has an intensity that does not melt the surface (lower layer) to be modeled. Note that in the embodiment shown in FIG. 5, the laser from the laser source 802 is configured to be branched by a half mirror 808 and irradiated in front of the DED nozzle 810; A separate laser source independent of laser source 802 may be used.

When modeling is performed using the DED head 800, materials can be stacked at a predetermined position by irradiating a laser while supplying material powder to a predetermined position from the DED nozzle 810. In the DED head 800 shown in FIG. 5, the laser is irradiated forward in the direction of movement, so the laser is irradiated immediately before the material powder and the modeling laser are supplied. Therefore, the surface of the part to be modeled (lower layer) is heated by the laser. Generally, the lower the temperature, the worse the wettability. Therefore, by preheating the surface of the portion to be modeled (lower layer) with a laser as in this embodiment, the wettability of the surface of the portion to be modeled (lower layer) can be improved. When wettability is improved, the melted material supplied from the DED nozzle 810 tends to stay at the intended location, making it possible to perform stable modeling.

The features of the DED head 800 shown in FIG. 5 can be employed in the AM device 100 disclosed herein. For example, the DED head 800 shown in FIG. 5 may be used as the first DED head 200 and the second DED head 300 disclosed in this specification. Further, in the case of the AM apparatus 100 including the cooling device 700, as in the embodiment shown in FIG. The surface is temporarily preheated by the laser, improving surface wettability and allowing stable modeling.

At least the following technical idea can be understood from the above-described embodiments.
[Form 1] According to Form 1, an AM device for manufacturing a modeled object is provided, and the AM device includes a first DED nozzle for modeling the outline of the object to be modeled, and an inner side of the outline. and a second DED nozzle for.

[Form 2] According to Embodiment 2, in the AM apparatus according to Embodiment 1, a supply device for supplying powder material inside the contour, and a beam irradiating the powder material arranged inside the contour. a first beam irradiation head for.

[Embodiment 3] According to Embodiment 3, the AM apparatus according to Embodiment 1 or Embodiment 2 includes a second beam head for irradiating a beam onto the surface of a modeled object.

[Form 4] According to Embodiment 4, the AM apparatus according to any one of Embodiments 1 to 3 includes a thermometer that measures the surface temperature of the object being formed.

[Form 5] According to Form 5, the AM apparatus according to any one of Forms 1 to 4 includes a base plate for supporting the object to be modeled, and the base plate supports two orthogonal directions in a horizontal plane. It is placed on a movable XY stage.

[Embodiment 6] According to Embodiment 6, the AM apparatus according to any one of Embodiments 1 to 5 includes a cooling device for cooling the modeled portion during modeling.

[Embodiment 7] According to embodiment 7, an AM device for manufacturing a modeled object is provided, and the AM device includes a first DED nozzle for modeling the outline of the object to be modeled, and a powder inside the outline. It has a supply device for supplying material, and a first beam irradiation head for irradiating the powder material arranged inside the contour with a beam.

[Embodiment 8] According to embodiment 8, the AM apparatus according to embodiment 7 includes a second DED nozzle for modeling the inside of the contour.

[Embodiment 9] According to embodiment 9, the AM apparatus according to embodiment 7 or embodiment 8 includes a second beam head for irradiating a beam onto the surface of a modeled object.

[Embodiment 10] According to embodiment 10, the AM apparatus according to any one of embodiments 7 to 9 includes a thermometer that measures the surface temperature of the object being formed.

[Embodiment 11] According to embodiment 11, the AM apparatus according to any one of embodiments 7 to 10 includes a base plate for supporting the object to be modeled, and the base plate is arranged in two orthogonal directions within a horizontal plane. It is placed on a movable XY stage.

[Embodiment 12] According to embodiment 12, the AM apparatus according to any one of embodiments 7 to 11 includes a cooling device for cooling the modeled portion during modeling.

[Embodiment 13] According to embodiment 13, a method for manufacturing a modeled object by the AM method is provided, and the method includes the steps of: modeling the outline of the object to be modeled by DED; modeling the inside of the outline; has.

[Embodiment 14] According to embodiment 14, in the method according to embodiment 13, the step of modeling the inside of the contour is performed by DED.

[Embodiment 15] According to embodiment 15, in the method according to embodiment 13, the step of modeling the inside of the contour is performed by PBF.

[Embodiment 16] According to embodiment 16, the method according to any one of embodiments 13 to 15 includes a step of remelting and resolidifying the surface of the shaped object.

[Embodiment 17] According to embodiment 17, the method according to any one of embodiments 13 to 16 includes a step of controlling the temperature of the object during modeling.

[Form 18] According to Form 18, in the method according to Form 17, the step of controlling the temperature of the modeled object during modeling includes the step of measuring the surface temperature of the modeled object during modeling, and the step of measuring the surface temperature of the modeled object during modeling. and cooling the.

DESCRIPTION OF SYMBOLS 100...AM apparatus 102...Base plate 104...XY stage 150...Thermometer 170...Control device 200...1st DED head 210...DED nozzle 220...Movement mechanism 300...2nd DED head 310...DED nozzle 320...Movement mechanism 400...Material supply mechanism 500...First beam irradiation head 600...Second beam irradiation head 700...Cooling device 800...DED head 810...DED nozzle M1...Outline part M2...Inner part M...modeled object

Claims (13)

An AM device for manufacturing a shaped object,
a first DED nozzle for modeling the outline of the object to be modeled;
a feeding device for feeding powder material inside the contour;
a first beam irradiation head for irradiating a powder material placed inside the contour with a beam;
a beam shaper for converging the beam irradiated from the first beam irradiation head into a rectangular shape on the powder material supplied inside the contour;
AM device. The AM device according to claim 1,
having a second beam head for irradiating a beam onto the surface of the modeled object;
AM device. The AM device according to claim 1 or 2,
It has a thermometer that measures the surface temperature of the object being formed.
AM device. The AM device according to any one of claims 1 to 3,
It has a base plate for supporting the object to be modeled,
The base plate is placed on an XY stage that is movable in two orthogonal directions in a horizontal plane.
AM device. The AM device according to any one of claims 1 to 4,
It has a cooling device for cooling the modeled part during modeling.
AM device. The AM device according to any one of claims 1 to 5, further comprising:
a bridge plate disposed inside the contour;
AM device. 7. The AM device according to claim 6,
the bridge plate has a cooling device;
AM device. A method of manufacturing a modeled object by an AM method, the method comprising:
modeling the outline of the object to be modeled by DED;
modeling the inside of the contour with PBF,
The step of modeling the inside of the contour with PBF,
supplying powder material inside the contour;
irradiating a beam onto powder material provided inside the contour;
converging the beam rectangularly onto a powder material provided inside the contour;
Method. 9. The method according to claim 8,
a step of remelting and resolidifying the surface of the shaped object;
Method. The method according to claim 8 or 9,
having a step of controlling the temperature of the modeled object during modeling;
Method. 11. The method according to claim 10,
The step of controlling the temperature of the object during printing is
a step of measuring the surface temperature of the modeled object during modeling;
cooling the modeled part during modeling;
Method. 12. The method according to any one of claims 8 to 11,
The step of modeling the inside of the contour with PBF includes the step of arranging a bridge plate inside the contour.
Method. 13. The method according to claim 12,
the bridge plate has a cooling device;
Furthermore, a step of cooling the modeled object by the cooling device of the bridge plate,
method .

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